TR Moevment

I have a BW system with standard landscape of Dev, QA and PRD systems. Also i have GRC systems with landscape of Dev and PRD systems.

I have created TR in BW system , which is having objects with source systems of GRC. When i am moving the TR to BW Developments system to QA , it is giving me an error with No source system exists (GRC QA ).

Kindly advice for these objects to be moved from Dev - QA and QA - PRD systems.